Vibration damping device and bucket for construction machine
AssigneeKomatsu Ltd.
InventorsKazuya Imamura, Kuniaki Nakada, Taizou Nakagawa
Life of this patent
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Abstract
A vibration damping device capable of maintaining high vibration damping effect, and a bucket for a construction machine. The vibration damping device has a laminated plate (20) having at least its inner region fixed in a noise-emitting base material (11), the inner region being a region (G) other then a region which becomes a loop in a vibration mode when the base material (11) is vibrated in a vibration mode with a predetermined frequency.
Claims13
A vibration damping device comprising a laminated plate (20) in which an interior part being inside of an outer periphery of the laminated plate (20 is fastened to a side plate (11) of a bucket (10) of a construction machine,
- the interior part is within a region G comprising:
- i) a part D consisting of a center point d of a line segment BC and an area in the vicinity of the center point d,
- the line segment BC connecting a point B and a circular arc center C of the side plate (11) having an outer periphery including a substantially circular arc shape in at least a portion of one side,
- the point B being where a line segment CA intersects with the outer periphery of the laminated plate (20),
- the line segment CA connecting the circular arc center C of the side plate (11) and a point A where, on the outer periphery of the side plate (11), there is a transition from the substantially circular arc shape to another shape on a side of attachment of the bucket (10) to the construction machine;
- ii) a part F consisting of a center point f of the line segment CA and an area in the vicinity of the center point f;
- and
- iii) a region between the part D and the part F.
A vibration damping device comprising a laminated plate (20) in which at least an interior art of the laminated slate (20) is fastened to a base material (11) that emits noise wherein:
- the base material (11) constitutes a side plate (211) of a bucket (200) of a construction machine, and the device further comprises a bottom plate (212), at least a portion of which is connected to the side plate (211),
- the interior part is a part G which is a part other than a part that forms a loop of a vibration mode when the base material (11) is caused to vibrate in a vibration mode at a specified frequency, and
- in cases where a ratio Wp/Hs of a width Wp of the bottom plate (212) to a height Hs of the side plate (211) is 1.47 or greater, at least a part (K) of the portion where the side plate (211) and the bottom plate (212) are connected is reinforced.
A vibration damping device comprising a laminated plate (220) in which at least an interior part being inside of an outer periphery of the laminated plate (220) is fastened to a side plate (211) of a bucket (200) of a construction machine, wherein
- the device further comprises a bottom plate (212), at least a portion of which is connected to the side plate (211),
- the interior part is within a region G comprising:
- i) a part D consisting of a center point d of a line segment BC and an area in the vicinity of the center point d,
- the line segment BC connecting a point B and a circular arc center C of the side plate (211) having an outer periphery including a substantially circular arc shape in at least a portion of one side,
- the point B being where a line segment CA intersects with the outer periphery of the laminated plate (220),
- the line segment CA connecting the circular arc center C of the side plate (211) and a point A where, on the outer periphery of the side plate (211), there is a transition from the substantially circular arc shape to another shape on a side of attachment of the bucket (200) to the construction machine;
- ii) a part F consisting of a center point f of the line segment CA and an area in the vicinity of the center point f;
- and
- iii) a region between the part D and the part F, and
- in cases where a ratio Wp/Hs of a width Wp of the bottom plate (212) to a height of the side plate (211) is 1.47 or greater, at least a part (K) of the portion where the side plates (211) and the bottom plate (212) are connected is reinforced.
A vibration damping device comprising a laminated plate (20), at least an interior part of the laminated plate (20) is fastened to a base material (11) that emits noise,
- wherein the base material (11) constitutes a side plate (211) of a bucket (200) of a construction machine, and the device further comprises a bottom plate (212), at least a portion of which is connected to the side plate (211), and
- the interior part is a part (G) which is a part other than a part that forms a loop of a vibration mode when the base material (11) is caused to vibrate in a plurality of vibration modes, and
- in cases where a ratio Wp/Hs of a width Wp of the bottom plate (212) to a height Hs of the side plate (211) is 1.47 or greater, at least a part (K) of the portion where the side plate (211) and the bottom plate (212) are connected is reinforced.
Dependencies are inferred from the claim text.